Wins and lo ses don't count in the NFL preseason -- but individual performances sure do. After each week's slate of preseason action, Bucky Brooks will shine the spotlight on one notable player from each team in the league, grading that player's performance and providing a snapshot of how he's doing in this critical dre s-rehearsal phase of the 2015 campaign. The performance grading scale is as follows:A: Masterful B: Strong C: Acceptable D: Marginal F: UnacceptableEASTBuffalo Bills: Tyrod Taylor, QBGRADE: BStrengths: Coach Rex Ryan's fascination with Taylor stems from the quarterback's athleticism and improvisational skills. He is a fantastic playmaker on the move, and his ability to escape pre sure and also execute designed quarterback runs adds another dimension to the ' offense. With a strong running game behind him, Taylor's potential as a dual-threat is problematic for opponents.Weakne ses: Taylor was electric executing movement-based concepts (bootlegs), but he mi sed a few deep shots down the field on Friday. Those failed connections are worrisome for an offense that should see a lot of one-on-one coverage on the outside, due to the attention running back commands in the backfield.What he needs to work on: Though this will be his fifth NFL season, Taylor has limited game experience (35 career pa s attempts in four years with the ) and needs to show coaches he can handle the pre sure of directing starters against the opponent's first-team defense. If he can thrive in that environment, the will feel better about his chances of doing it when things get more intense in a few weeks.Miami Dolphins: Zach Vigil, Tom Brady Jersey LBGRADE: A-Strengths: Active linebackers with instincts and rush skills always stand out on tape, and Vigil showed a knack for playmaking and a strong nose for the ball during his preseason debut on Thursday, finishing with five tackles and a sack.Weakne ses: It's hard to knock Vigil for his performance in Week 1, but the youngster has to work on his overall consistency. The splash plays masked some of Vigil's unrefined technique and false steps, but diligent work in the film room could help him play faster .What he needs to work on: Undrafted rookie free agents must make an immediate impre sion if they are to stick on the 53-man roster, and Vigil definitely opened eyes with his strong showing in Week 1. But he has to continue making plays, even with his on-field time likely to decrease as the starters get extended reps going forward. To sustain momentum, he must make a splash play on special teams or with the second- and third-stringers the next time out.New England Patriots: Jimmy Garoppolo, QBGRADE: CStrengths: The quick-rhythm pa ser has a reputation for getting the ball out of his hands in a prompt manner. Garoppolo is a little streaky with his ball placement and touch, but he shows the ability to hit receivers within the strike zone when delivering the ball from a clean pocket.Weakne ses: Although Garoppolo is known for quickly releasing the ball, on Thursday, he was hesitant and indecisive when took away his first read. He repeatedly held onto the ball for extended periods, resulting in several sacks and negative plays for the ' offense. New England's leaky offensive line certainly played a role in Garoppolo's struggles; still, he needs to play with better awarene s within the pocket.What he needs to work on: The second-year pro must become more decisive and efficient from the pocket to keep the offense humming while is sidelined. He played faster when the jumped into their no-huddle offense, and he needs to build on that momentum .New York Jets: Bryce Petty, QBGRADE: DStrengths: Petty is a talented pa ser with intriguing physical tools, but the rookie remains a work in progre s as an NFL quarterback. The fourth-round draft pick is a quick-rhythm pa ser capable of delivering throws accurately and on time, but he is still transitioning from the spread offense he worked in at Baylor to a traditional system. Weakne ses: Petty is an indecisive pa ser from the pocket. He struggled reading coverage and his uncertainty led to misfires or late throws. Petty's lack of awarene s is problematic for an offense that's predicated on rhythm throws.What he needs to work on: Petty simply needs more repetitions in game action. He is a developmental project and must learn how to orchestrate an offense under dure s. Petty struggled against Detroit, but the experience should help him perform better in subsequent weeks. NORTHBaltimore Ravens: Maxx Williams, TEGRADE: BStrengths: Williams is a smooth pa s-catching tight Michigan Wolverines Jersey end with strong hands and sneaky movement skills. The rookie not only shows a knack for finding the open windows in zones, but he's crafty enough to work away from man-to-man coverage in space. In addition, the second-round pick is a talented runner with the ball in his hands, as evidenced by his remarkable hurdle at the end of a 22-yard catch-and-run .Weakne ses: Despite Williams' impre sive ball skills and tracking ability, he can drop an easy ball due to a concentration lapse. Although he didn't suffer a blatant drop against New Orleans, he did fail to come up with a slightly off-target throw from in the end zone that would've ranked as a spectacular catch on most highlight reels. Granted, it's nitpicking to call a mi sed 50-50 ball a drop, but Williams has shown the potential to make those kinds of plays in key moments.What he needs to work on: Slated to play a big role in the ' offense , Williams needs to continue to progre s as a route runner and playmaker. Still, he's on track to develop into one of the ' key playmakers this season.Cincinnati Bengals: Tyler Eifert, TEGRADE: BStrengths: Eifert is finally healthy and playing like the ultra-athletic playmaker the envisioned when they selected him with the 21st overall pick in the 2013 , reeling in two catches for 30 yards . He capably runs away from defenders down the seam, yet also displays the balance and body control to separate out of his breaks.Weakne ses: Eifert is not a heavyweight blocker in the run game, but he is serviceable at the point of attack. He simply stays in front of his man and keeps him from making a play on the runner. It's not pretty, but it's enough to allow the to run the ball effectively on the perimeter.What he needs to work on: Eifert must remain healthy and available during training camp. He has developed a strong rapport with quarterback and appears to be the ' second option in the pa sing game.Cleveland Browns: Justin Gilbert, CBGRADE: BStrengths: Gilbert is a sticky bump-and-run corner with impre sive athleticism and ball skills. When he is instructed to play aggre sive pre s coverage at the line of scrimmage, the former first-round draft pick flashes the potential to develop into an elite playmaker.Weakne ses: A lack of discipline and concentration leads to big-play chances for the opponent. on a deep pa s from was the only thing that prevented the from cashing in on a mental mistake by the second-year pro . Cleveland's coaches certainly will point out Gilbert's miscues when reviewing the tape with the team.What he needs to work on: Gilbert has to build upon his impre sive Joe Kerridge Jersey flashes with more consistent play throughout the game. While his ball skills and instincts lead to a few sizzle plays, the coaches need to see him continue to play disciplined football when he steps onto the field .Pittsburgh Steelers: Martavis Bryant, WRGRADE: B+Strengths: The second-year pro is already viewed as , but he continues to show scouts that he has a knack for getting behind the defense on vertical throws. on Friday was the latest example of how he can blow past defenders on go routes.Weakne ses: Bryant is still a work in progre s as a route runner. The tall, rangy athlete is at his best executing speed cuts (routes that allow the receiver to stay on the move instead of breaking down and re-directing). But he needs to be able run the entire route tree to be a standout WR1 or WR2 as a pro.What he needs to work on: Bryant is an intriguing player with an impre sive set of skills. Already slated for a big role as a deep threat, he could crack the ' starting lineup by demonstrating more attention to detail as a route runner.SOUTHHouston Texans: Alfred Blue, RBGRADE: BStrengths: Blue is a cla sic downhill runner capable of churning out big yards between the tackles. The second-year pro runs behind his pads and displays the physicality needed to routinely reach the second level on power plays. Most importantly, Blue flashed enough speed and quickne s to blow through creases at the point of attack.Weakne ses: Blue is in line to replace -- after suffering a major groin injury earlier this month -- as the ' feature back to start the season. But Blue isn't nearly as polished as a receiver out of the backfield, and he wasn't intimately involved in the ' pa sing game . If Blue is to become more than a two-down player in the game plan, he needs to be a factor as a receiver.What he needs to work on: The former sixth-round pick earned solid reviews for his play as a fill-in last year, but he needs to show coaches and scouts that he can anchor the offense as the team's RB1. If he can consistently pick up the hard yards against the opponent's starters, head coach Bill O'Brien will feel better about Blue serving as the workhorse until Foster returns.Indianapolis Colts: Phillip Dorsett, WRGRADE: B-Strengths: Dorsett's speed and explosivene s jump off the screen. Not only is the rookie noticeably faster than his teammates, but he po se ses the kind of stop-start quickne s that makes him an intriguing weapon on catch-and-run plays (quick screens and cro sing routes).Weakne ses: His hands were the biggest concern during the pre-draft proce s, but the 29th overall pick caught the ball well (four catches for 51 yards). However, after making a catch on a cro sing route; the lack of ball security in traffic was surprising to see from a standout kick returner.What he needs to work on: The rookie certainly looked like a dynamic weapon in his preseason debut. If he can continue to consistently catch the ball and become a more refined route runner, the budding star will emerge as a huge threat on the perimeter and alleviate some of the pre sure on to anchor the pa sing game.Jacksonville Jaguars: Blake Bortles, QBGRADE: B+Strengths: Bortles is a big, athletic signal caller with outstanding arm talent, a decisive pa ser playing with improved footwork and mechanics from the pocket. on Friday, Bortles had a strong performance, quickly working through his reads to hit the second or third option in the progre sion.He was decisive and accurate with the ball. He also showed better awarene s and command by exhausting his options within a route before looking to flee the pocket.Most importantly, he didn't turn the ball over and looked like he was in complete command of the offense.Weakne ses: The second-year pro continues to deal with growing pains as the ' starting quarterback. He fails to sync his feet with his eyes at times, leading to errant throws from the pocket. He's made significant strides in this area, but he needs to continue to hone his skills as Dymonte Thomas Jersey a pocket pa ser.What he needs to work on:With more repetitions against complex coverage on the horizon, Bortles needs to continue to show patience and composure as a playmaker from the pocket.Tenne see Titans: Marcus Mariota, QBGRADE: C+Strengths: The second overall pick is an efficient playmaker from the pocket with outstanding physical tools (arm strength and athleticism) and awarene s. Mariota makes good decisions with the ball when given ample time in the pocket; he flashes the ability to pick apart defenses with a "dink and dunk" approach.Weakne ses: Mariota struggled with ball security at Oregon, putting the ball on the ground too frequently for an elite quarterback, and he didn't show awarene s with rushers in close proximity. Those i sues remain a concern after watching him early in . Mariota also , although he is generally a judicious pa ser with a good feel for risk-taking.What he needs to work on:The rookie showed outstanding composure and resilience bouncing back from his poor start against Atlanta. He needs to build upon the momentum created during his final series to get the off to a faster start . Most importantly, the coaches need to identify which routes and concepts will help the rookie pa ser find his rhythm early in games.WESTDenver Broncos: Brock Osweiler, QBGRADE: A-Strengths: Osweiler is an efficient pa ser with a good feel for coach Gary Kubiak's play-action pa sing game. The fourth-year pro delivered the ball on point and on target following strong run fakes; his overall efficiency allowed the to stay on schedule against a swarming ' defense . Most importantly, Osweiler (15 of 20 for 151 yards and a touchdown) showed impre sive grit and toughne s delivering accurate throws with rushers in close proximity.Weakne ses: It's hard to knock Osweiler for his performance against Seattle. He patiently worked the underneath areas of coverage and showed the ability to get to his second or third read in the progre sion. Given the challenge Seattle's defense presents, the performance was quite impre sive.What he needs to work on: Osweiler simply needs more reps to increase his confidence as a potential starting quarterback. If he continues to stay within his boundaries, he can solidify his standing as the ' quarterback of the future.Kansas City Chiefs: Ramik Wilson, LBGRADE: B-Strengths: The fourth-round pick is an active linebacker with a strong nose for the ball. He quickly diagnoses plays and finds a way to get around the action. Although hustling isn't a skill, the extra effort Wilson displays on the field will ultimately lead to positive plays.Weakne ses: Like most young linebackers, Wilson struggles to take on and disengage from blockers in the hole. He needs to continue to work on his combat skills and find a way to consistently slither through traffic to get to the ball.What he needs to work on: Wilson made a positive impre sion in his preseason debut , racking up six tackles and . He can enhance his chances of making the squad by continuing to impre s as a position player while also making a handful of plays on special teams. Wilson needs to be active and physical against the run while also showing discipline and awarene s as a pa s defender. If he continues to progre s in those areas, he will make a strong push to earn a spot as a backup player on a team loaded with talent.Oakland Raiders: Amari Cooper, WRGRADE: B+Strengths: Cooper was roundly touted as the most pro-ready receiver to enter the NFL in years ahead of the 2015 , and the fourth overall pick definitely lived up to the hype against the . Not only did he display outstanding polish as a route runner, but he is an electric WR1 with sneaky running skills on the perimeter. Weakne ses: Defeating pre s coverage at the line will be Cooper's biggest challenge as a pro. Although he is a skilled route runner with an array of releases, he still needs Tommy Henry Jersey to work on escaping the clutches of physical defenders in tight coverage.What he needs to work on: As the ' clear WR1, he must prepare for the double coverage that he'll inevitably face down the road. He won't see exotic coverage during the preseason, but he can work on his escape skills against pre s or rolled coverage. How well he fares during the preseason will give the ' coaches an indication of how to build a game plan to get him loose against elite competition.San Diego Chargers: Melvin Gordon, RBGRADE: C-Strengths: The 15th overall pick is an explosive runner with exceptional speed and quickne s. He is at his best attacking the edges, but also shows the vision and burst to split creases between the tackles. Weakne ses:The rookie looks unsure and hesitant at the line of scrimmage. on Thursday, he frequently stopped his feet or stutter-stepped immediately after taking the handoff, leading to minimal gains (11 yards on six carries) against a fast-flowing defense.What he needs to work on: Gordon must be more aggre sive and decisive with the ball in his hands. As quickly as holes close in the NFL, Gordon has to find a way to makes his reads on the run to be a productive pro.Follow Bucky Brooks on Twitter .